|genome statistics - rodolfo|
Keywords: bases; nucleotides
|Characterization and identification of a novel guanine nucleotide binding site on the bovine mitochondrial ribosome - Anders, John Claude|
Keywords: Research; Guanine Nucleotides; Guanosine Triphosphate--analogs
|Molecular bases for unity and diversity in organic evolution - Fox, S. W.|
The origin of biological information has been ascribed at various times to DNA, RNA, or protein. The origin of nucleic acids without the action of prior informed protein has not been supported by plausible experiments, although such possibilities have been examined. The behavior of thermal proteins and of the microspheres selfassembled therefrom explain the origin of the first cells, the first membrane, the first reproduction cycle, ancient metabolism including ATP-aided synthesis of peptides an...
Keywords: MOLECULES; DERIVATION; INFORMATION TRANSFER; MONOMERS; NUCLEOSIDES; NUCLEOTIDES; PEPTIDES; POLYMERIZATION; SUGARS; TEMPLATES; ANALOGS
|Far-Infrared Astronomy with The Kuiper Airborne Observatory - Hildebrand, Roger, H|
This report summarizes work made possible by NASA's Kuiper Airborne Observatory. The results of the work have appeared in over 80 papers. The publications fall in three main areas: instrumentation, observations, and analysis. Although there is considerable overlap between these categories it will be convenient to group them separately.
Keywords: BACTERIA; NITRATES; NUCLEOTIDES; ADENOSINE TRIPHOSPHATE; ANTIBODIES; ANTISERUMS; MEMBRANES; ADENOSINES; ENZYME ACTIVITY; INHIBITORS; NEUROSPORA
|High Resolution Doppler Lidar - NON|
This Grant supported the development of an incoherent lidar system to measure winds and aerosols in the lower atmosphere. During this period the following activities occurred: (1) an active feedback system was developed to improve the laser frequency stability; (2) a detailed forward model of the instrument was developed to take into account many subtle effects, such as detector non-linearity; (3) a non-linear least squares inversion method was developed to recover the Doppler shift and aerosol ...
Keywords: ELUTION; NUCLEIC ACIDS; OLIGOMERS; PEPTIDES; CHROMATOGRAPHY; NUCLEOTIDES; ALKALINITY; ION EXCHANGING; BIOCHEMISTRY
|LEM radiator study - Hoch, A.|
No Abstract Available
Keywords: DICHROISM; NUCLEOTIDES; POLYMERIC FILMS; DEOXYRIBONUCLEIC ACID; HUMIDITY; LIQUID CRYSTALS; SPECTRUM ANALYSIS
|INITIATION OF SOLID EXPLOSIVES BY IMPACT - AFANASEV, G. T., et al|
INITIATION AND SENSITIVITY OF SOLID EXPLOSIVES TO MECHANICAL IMPACT
Keywords: CYANO COMPOUNDS; ELASTOMERS; HYDROCARBON FUELS; PYRIDINE NUCLEOTIDES; ELECTRICAL PROPERTIES; ENERGY TRANSFER; MAGNETIC TAPES; METHANE; POLYMER CHEMISTRY
|Finite Elements and Finite Differences for Transonic Flow Calculations - Hafez, Mohamed M.|
Finite difference methods for transonic flow calculations are briefly reviewed. Applications of the finite element approach are studied. Different discretization techniques, with different regularization methods as well as different iterative procedures for solving the approximate problem, are examined.
Keywords: ENZYME ACTIVITY; ENZYMES; NICOTINAMIDE; POLYMERIZATION; NUCLEOTIDES; PHOSPHORYLATION; BIOPOLYMERS; MOLECULAR CHAINS; OLIGOMERS; THYMUS GLAND
|The Origin of Life--Did It Occur at High Temperatures - Miller, Stanley L.|
A high-temperature origin of life has been proposed, largely for the reason that the hyperthermophiles are claimed to be the last common ancestor of modern organisms. Even if they are the oldest extant organisms, which is in dispute, their existence can say nothing about the temperatures of the origin of life, the RNA world, and organisms preceding the hyperthermophiles. There is no geological evidence for the physical setting of the origin of life because there are no unmetamorphosed rocks from...
Keywords: MOLECULAR STRUCTURE; METABOLISM; MOLECULES; NUCLEOTIDES; RIBONUCLEIC ACIDS; POLYPEPTIDES; PROTEINS; COENZYMES; CATALYSIS; COVALENCE; ENZYMES; GUANOSINES
|Phosphorylation of Glyceric Acid in Aqueous Solution Using Trimetaphosphate - Kolb, Vera|
The phosphorylation of glyceric acid is an interesting prebiotic reaction because it converts a simple, potentially prebiotic organic molecule into phosphate derivatives that are central to carbohydrate metabolism. We find that 0.05 M glyceric acid in the presence of 0.5 M trimetaphosphate in alkaline solution gives a mixture of 2- and 3-phosphoglyceric acids in combined yields of up to 40%.
Keywords: RIBONUCLEIC ACIDS; HYDROLYSIS; NUCLEOTIDES; PH; HALF LIFE; STABILITY; TEMPERATURE DEPENDENCE; RINGS
|Experiences with optimizing airfoil shapes for maximum lift over drag - Doria, Michael L|
The goal was to find airfoil shapes which maximize the ratio of lift over drag for given flow conditions. For a fixed Mach number, Reynolds number, and angle of attack, the lift and drag depend only on the airfoil shape. This then becomes a problem in optimization: find the shape which leads to a maximum value of lift over drag. The optimization was carried out using a self contained computer code for finding the minimum of a function subject to constraints...
Keywords: BIOLOGICAL EVOLUTION; REACTION KINETICS; AQUEOUS SOLUTIONS; CHEMICAL BONDS; TEMPLATES; CHEMICAL EVOLUTION; GUANOSINES; HYDROLYSIS; NUCLEOTIDES; OLIGOMERS; POLYMERIZATION; POLYNUCLEOTIDES; PROTEIN SYNTHESIS
|U-Groove Aluminum Weld Strength Improvement - Verderaime, V.|
Though butt-welds are among the most preferred joining methods in aerostructures, their strength dependence on inelastic mechanics is generally the least understood. This study investigated experimental strain distributions across a thick aluminum U-grooved weld and identified two weld process considerations for improving the multipass weld strength. One is the source of peaking in which the extreme thermal expansion and contraction gradient of the fusion heat input across the groove tab thickne...
Keywords: CALCIUM; GENETICS; PEPTIDES; NUCLEOTIDES; PHOSPHORYLATION; SEQUENCING; SUBSTRATES; PROTEINS; GENES; CORN; PLANT ROOTS; AMINO ACIDS; CALMODULIN; CHEMICAL BONDS; CODING
|Second Aerospace Environmental Technology Conference - NON|
The mandated elimination of CFC'S, Halons, TCA, and other ozone depleting chemicals and specific hazardous materials has required changes and new developments in aerospace materials and processes. The aerospace industry has been involved for several years in providing product substitutions, redesigning entire production processes, and developing new materials that minimize or eliminate damage to the environment...
Keywords: AMINO ACIDS; RADIOACTIVITY; CARBON 14; ETHYL COMPOUNDS; NUCLEOTIDES; ENZYME ACTIVITY; THIOLS; ADENOSINE TRIPHOSPHATE; CATALYSTS; BACTERIA; HALOPHILES; INHIBITORS
|Reliability Analysis of the X-29A Flight Control System Software - Davis, Gloria J.|
Software reliability measurements of safety-critical software systems are not well understood. In particular, a significant part of the testing of flight control software for high performance aircraft is performed in full-up systems tests, so the applicability of models developed for pure software systems is unknown. In this study, data from flight tests of the X-29A forward-swept wing aircraft, performed at NASA's Dryden Flight Research Facility, are analyzed with the Statistical Modeling and E...
Keywords: EXOBIOLOGY; NUCLEOTIDES; JOINTS (JUNCTIONS); AQUEOUS SOLUTIONS; AMINES; SYNTHESIS (CHEMISTRY); ACCEPTOR MATERIALS; HYDROCHLORIDES; METHYL COMPOUNDS; HYDROLYSIS; THYMIDINE; TEMPLATES; RESIDUES
|Optical constants of liquid and solid methane - Martonchik, John V.|
The optical constants n(sub r) in(sub i) of liquid methane and phase 1 solid methane were determined over the entire spectral range by the use of various data sources published in the literature. Kramers-Kronig analyses were performed on the absorption spectra of liquid methane at the boiling point (111 K) and the melting point (90 K) and on the absorption spectra of phase 1 solid methane at the melting point and at 30 K...
Keywords: UREAS; POLYMERIZATION; CONDENSATION; GELS; AMINO RADICAL; ELECTROPHORESIS; RADIOACTIVE ISOTOPES; POTASSIUM ISOTOPES; AQUEOUS SOLUTIONS; FORMALDEHYDE; OLIGOMERS; POLYMER CHEMISTRY; PHENOLS; COPOLYMERS; NUCLEOTIDES; RADIOCHEMISTRY; ISOTOPIC LABELING
|OCW Scholar: Fundamentals of Biology|
Instructor: Dr. Michelle Mischke This collection contains clips from lecture videos of MIT's Introduction to Biology classes. Each video will show the instructor explaining a concept that is covered in the session of the Fundamentals of Biology. View the complete course: http://ocw.mit.edu/7-01SCF11
Keywords: Mendel; Mendel's laws; pea plants; experiments; inherited traits; controls; gene; allele; genotype; heterozygote; homozygote; phenotype; dominant; recessive; independent assortment; round; wrinkled; green; yellow; true-breeding; cytology; chromosomes; drosophila; levels of organization; biosphere; ecosystem; organism; organ; tissues; cells; organelles; molecules; nucleated cells; prokaryotes; eukaryotes; heredity; transforming principle; Griffiths; Pneumoccocus bacteria; virulent; Avery; McCarty; McLeod; DNA; adenine; guanine; thymine; cytosine; deoxyribose; polymerization; Hershey-Chase; bacterial viruses; Watson; Crick; Franklin; x-ray crystallography; double helix; Meselson and Stahl; semi-conservative replication; semi-conservative replication model; DNA; 14N; 15N density centrifugation; DNA Replication; enzyme; bacterial cells; assay; 5'; 3'; primer; nucleotides; DNA Polymerase; primase; ligase; topo isomerase; topological problem; fidelity of replication; cloning; purification; vector; transformation